Method and jig for holding contact lens material, using light-scattering bonding adhesive

Abstract

A jig adapted to hold a contact lens material having a concave surface, for holding the contact lens material, including a protruding portion which has a top end having as an outer surface thereof a convex surface. This convex surface of the jig is bonded to the concave surface of the contact lens material. The protruding portion has a recess which extends from an inner surface of the top end toward a bottom end of the protruding portion. The recess is defined by an inner surface which includes a first portion that corresponds to the convex surface of the top end of the protruding portion. At least the first portion of the inner surface is toughened with a light-scattering texture. A method of holding the contact lens material while the contact lens material is processed into a contact lens is disclosed.

What is claimed is: 
     
       1. A method of holding a contact lens material having a concave surface while the contact lens material is processed into a contact lens, comprising the steps of: preparing a Jig including a protruding portion which has a top end having as an outer surface thereof a convex surface and a bottom end, said convex surface being adapted to be bonded to said concave surface of the contact lens material, said protruding portion having an inner surface that defines a recess which extends from said top end opposite said convex surface, toward the bottom end of the protruding portion, said inner surface including a first portion that corresponds to said convex surface of said top end of said protruding portion;   applying an ultraviolet-curable bonding agent to at least one of said concave surface of said contact lens material and said convex surface of said protruding portion of said Jig;   placing said contact lens material such that said concave surface of said contact lens material is in contact with said convex surface of said jig through said ultraviolet-curable bonding agent; and   irradiating said ultraviolet-curable bonding agent through said jig via means for scattering light to cure said ultraviolet-curable bonding agent and thereby bond said contact lens material and said jig together, said means for scattering light comprising a roughed light-scattering texture along said first portion of said inner surface.   
     
     
       2. A method as defined in claim 1, wherein said step of preparing a jig comprises roughly texturing said first portion of said inner surface of said recess with a network of minute indents. 
     
     
       3. A method as defined in claim 1, wherein said step of preparing a jig comprises forming said protruding portion of a transparent synthetic resin.